Synthesis and Studies of Magnetic Layered Host-Guest Materials

小行星9311597 这一提议的动机是合理设计磁性物质的挑战。 这项研究将利用层状材料中的结构控制来研究分子相互作用和磁耦合之间的相互作用。 磷酸盐层状主体的晶内环境将提供支架，以将有机无机插层剂定位在与层和彼此的明确关系中。 磁性层状磷酸盐和膦酸盐插层主体将通过氧化还原和离子交换插层方法合成。 插入特别设计的同构有机和无机组的帕拉磁性或反磁性客人将允许探测层内，层-客人，客人-客人，和更高阶的磁相互作用。 在顺磁性嵌入物的情况下，开壳层轨道的形状和相对于层的排列的作用可以结合廊道内的探索取向来评估。 最后，一个探索性的路径概述组装磁性主机层的顺磁任务。 由于该提案解决了磁耦合的结构问题，因此将出现具有磁定制特性的材料的合理设计的新策略。 此外，在这个层状磁性材料合成程序中组装的结构-磁性相关性将为新的磁性预测结构理论的发展提供动力。 虽然拟议工作的主要重点是合成，但将根据需要在与大学凝聚态物理组的既定合作范围内开发机械模型。 ***

9311597 Nocera This proposal is motivated by the challenge of rationally designing magnetic substances. This research will exploit the structural control available in layered materials to study the interplay between molecular interactions and magnetic coupling. The intracrystalline environments of phosphate layered hosts will provide the scaffolding to position organic inorganic intercalants in well-defined relationships to the layers and to each other. Magnetic intercalates of layered phosphate and phosphonate hosts will be synthesized by redox and ion-exchange intercalation methods. Insertion of specially designed isostructural organic and inorganic sets of para- or diamagnetic guests will permit the probe of intralayer, layer-guest, guest-guest, and higher order magnetic interactions. In the case of paramagnetic intercalants, the roles of the open-shell orbitals' shape and alignment relative to the layers can be assessed in connection with quest orientation within the galleries. Finally, an exploratory path is outlined to assemble magnetic host layers about paramagnetic quests. As this proposal addresses structural issues of magnetic coupling, new strategies for the rational design of materials with magnetically tailored properties will emerge. Additionally, the structure- magnetism correlations assembled in this layered magnetic materials synthesis program will provide impetus for the development of new predictive structural theories of magnetism. Although the primary focus of the proposed work is synthetic, development of mechanistic models will be pursued as needed within an established collaboration with the condensed matter physics group at the University. ***